A simple and novel setup for high-frequency dielectric spectroscopy of materials has been developed using a portable vector network analyzer. The measurement principle is based on radio-frequency reflectometry, and both its capabilities and limitations are discussed. The results obtained on a typical liquid crystal prove that the device can provide reliable spectra between $10^7$ Hz and $10^9$ Hz, thus extending the capabilities of conventional impedance analyzers.
Categories: physics.ins-det